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A friend just shared an article with me about "Mesopaper." Evidently filter "uses three layers of paper made from bamboo fiber, with ceramic granules sandwiched between each layer; the granules, manufactured from clay, have tiny pores small enough to capture heavy metals like arsenic, lead, or mercury, while letting water through, along with nutrients like calcium and magnesium."

The article goes on to say "a six-pack is $6.99; one 9″ diameter sheet can filter about 22 liters or six gallons, depending on how contaminated the water is."

Has anyone ever worked with "Mesopaper" or have any ideas on this method of filtration?

Hmm. This is surprising to me too. Iron-rich clay can readily adsorb arsenic under oxygen-rich conditions (this is actually the root of Bangladesh, and most of SE Asia's, arsenic contamination -- when the electrochemical conditions change, iron becomes soluble and releases the sorbed arsenic into the water), so I see how the clay could be useful. It doesn't make sense to me how this would sorb lead... My guess is just that it blocks suspended solids, which contain lead, rather than the clay or bamboo actually sorbing lead. In any case, this is interesting. I'd like to look for the journal papers published on this method, which would hopefully discuss the chemistry and provide data about its effectiveness.